Senior Software Engineer

Remote – UK / Europe (GMT to GMT+2)

Full-time | Early-stage VC-backed startup

up to £120,000 P/A

We’re hiring a Senior Backend Engineer to join a fast-growing, VC-backed startup building developer-facing AI infrastructure.

This is not a typical “CRUD API” role.

You’ll be building and owning the backend foundations behind AI-powered systems used by real users in production — APIs, distributed services, async workflows, data pipelines, and infrastructure that needs to scale reliably.

What You’ll Work On

• Designing and building production-grade APIs used by external developers
• Owning backend services that support AI agents and large data workflows
• Handling async processing, queues, caching, and traffic spikes
• Building systems that process complex or heavy data payloads
• Collaborating closely with Product & Design in a small, high-autonomy team
• Making pragmati...